bootchart: clean up control flow logic

Don't blindly exit() from random functions, but return a proper error
and upchain error conditions.

squash! bootchart: clean up control flow logic

When pread() returns "0", it's a read failure, so don't make the caller think
log_sample() was successful, return meaningful error code instead of 0.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/bootchart/store.h b/src/bootchart/store.h
index f211b6f53b..8cb319275c 100644
--- a/src/bootchart/store.h
+++ b/src/bootchart/store.h
@@ -32,4 +32,4 @@ extern int procfd;
 
 double gettime_ns(void);
 void log_uptime(void);
-void log_sample(int sample, struct list_sample_data **ptr);
+int log_sample(int sample, struct list_sample_data **ptr);